Commutator.



V. G. APPLE.

GOMMUTATOR.

APPLICATION HLM; MAR.10,1911.

Eatenteo July i6, mi2.

mmlm

| Y Y Y VINCENT e. APPLE, or DAYTON, oHIo.

COMMUTATOR.

Specification of LettersiPatent.

Patented July 16, 1912.

Application tiled lVLarch 10, 1911. Serial 1\To^ 613,640.

To al'twiom it may concern.-

Be it known that I, VINCENT G. APPLE, a citizen of the United States, residing at Dayton, in the county of Montgomery and.

Stateof Ohio, have inventedcertain new and useful Improvements in Commutators, of which the following is a specification.

My invention relates to improvements vin oommutators for dynamo-electric machines. One of the objects of my invention is toprovide a commutator wherein the parallel segments are spaced apart, to thereby afford intervening air spaces, and means for inducing air drafts through said spaces, whereby said segments, or bars, and the brushes bearing thereon, are maintained at a relatively loW temperature, and theprocess of commutation greatly improved, and where' by comminuted, electrically conducting particles Worn from the commutator and brushes are blown `away by the drafts of air superinduced by my improved construction, thereby preventing short-cireuiting,by

accumulation of said particles upon the in-l sulated parts of said commutator and brush-- supporting surfaces.

Other and further objects of my invention will be readily apparent from a consideration of the specification taken in conjunction with the drawing wherein;

Figure l is a'longitudinal central' sectie-n showing one half of said commutator. F 2 is a transverse section taken on line 2 2 of Fig'. 1. Fig. 3 is a fragmentary,transverse section, taken on line 3 3 of Fig. 1. Figt shows a cross-section view of a modified form of construction.

An armature shaft 5 .way at' each end. carried on said shaft on the end to the left, if the shaft were not broken away, and a bearing is contemplated for the other end, as usual in such -sructures A sleeve. (3 is provided with au integral flange disk, 7, flanged as atr S and secured to the shaft 5 by a. key or feather l0, seated in a key-way 11 Vmade inthe shaft and in like manneiyin the sleeve. The sleeve is screw threaded as at 12 for nuts 13 and 14.

is shown broken .A follower disk 15 slides freely over the threaded end of the sleeve Gand is flanged as at 16.-

A series of commutator segments, or bars The armature .is to be 17, are tapered at each end, as at 18, and to these bars the conducting wires of the armature are to be respectively connected, as usual in such structures.

Disks of insulating material 19, of lwhich there are two, that may be substantial dupli- Cates are provided with sockets 20, tapered to correspond with and -for proper seating of the tapered ends 18 of the bars 17. Separators 2l, are provided between adjacent sockets, and serve as means for spacing the bars apart to thereby provide air spaces 22 between adjacentl bars, shown somewhateX- aggerated in Fig. 2 for clearness of illustration. 'Ime-separators,y it will be observed, Continue along the tapered ends of the bars, the full distance of the Itaper thereby pro-l viding a stanch lateral support for the bars without shutting off any of the active surface of thecommutator from the free action of the air.

Grooves are provided between the shaft 9 and the sleeve 6, parallel to the axis thereot, as a means for admitting air, and radial holes 23 are made through the wall of the sleeve vat intervals, to permit the air to pass within the commutator housing 26. The longitudinal grooves, 24, of which there may be any desirable number, may be made interiorly of the sleeve, as shown in Fig. 9., or exteriorly of the shaft, as shown in Fig. it.

The operation of the device is as follows:

`When the commutator is being rotated at a high velocity the effect of' centrifugal action is to throw the air out between the commutator bars, such parts of the structure traveling at a higher rate of speed than the parts nearerthe axis, air will be drawn into the grooves 24, as at 25, pass through said grooves into and through the transverse holes 23 in to the housed space 26 and then out between the commutator bars. i This acliou produces a considerable draft of air., which effects a ra-pid cha-nge of air, and thereby carrying awa-y from the commutating` pa rtsany abnormal heat that may he eugenderml thereby, and causing the free,

small conducting particles, due to com1nu-. tation to be blown away, thus` keeping the commutator parts cool and clean.

While l .have herein described a single embodiment of my inventin, it is evident thatl many changes in the structure may be made from the spcciic showing, und Wihin he scope of the appended claims Without d@ par-nire from the spirit of the invention.

Hming described my invention, what i. claim is;

l. In on'xhina'ion with a'commutatnr hm'- ing n plurality of comnuiutor brs, tapered ui'- their ends, ciicuh'ifereni;iaiiy manged und spaced apart and housing' means iher'efm, of two disks (if insulating ninliei'ini one 'for @zich end of said hms; said disks provided with pockets 'for the ends of said hars,

und integral semi-:ding spacing shoulders between said pokshls.

Q. in :i coinnnitzi'my u pini-:iii'y of @on innmtor hai-s', tapered ai'. iheif ends, circumfeieniiuily arranged and' spaced :apart to provide nir spaces hci'enetwoen, disks of insulating niul'erml im mh (and of Said hars; said disk piovided wh pockets for ha ends of saidjims, and separating, spacing shonldevis beizwcfsn said pockets, and n. housing' siructue, `for suppming said insulating disks, housing si'ructure provided with n ir aperture nem-er the axis oi said coninniftator than are said hars im' inducing a draft of air through said Coniiiuiatr when rotated;

vn testimony Whei-QO hereunto set my hand in the presi-mcs fr? two witnesses.

VINCENT ii. JPLE. In th@ presence of# H. E. BORGER, N. E. SNYDER, 

